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Found that the matrix is prepending, which explains why the translation needed wrong values.

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RKrom 2014-06-01 11:25:27 +02:00
commit 5cb877f8c8
1 changed files with 4 additions and 4 deletions
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8
GreenshotPlugin/Core/Effects.cs
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@ -214,13 +214,13 @@ namespace Greenshot.Core {
public Image Apply(Image sourceImage, Matrix matrix) {
RotateFlipType flipType;
if (Angle == 90) {
matrix.Rotate(90);
matrix.Translate(0, -sourceImage.Height);
matrix.Rotate(90, MatrixOrder.Append);
matrix.Translate(sourceImage.Height, 0, MatrixOrder.Append);
flipType = RotateFlipType.Rotate90FlipNone;
} else if (Angle == -90 || Angle == 270) {
flipType = RotateFlipType.Rotate270FlipNone;
matrix.Rotate(-90);
matrix.Translate(-sourceImage.Width, 0);
matrix.Rotate(-90, MatrixOrder.Append);
matrix.Translate(0, sourceImage.Width, MatrixOrder.Append);
} else {
throw new NotSupportedException("Currently only an angle of 90 or -90 (270) is supported.");
}